Ludwig nicolai



L. NIOOLAI'. CARD BOARD TUBE.

No. 467,258. Patented Jan. 19, 1892.

UNITED STATES PATENT OFFICE.

LUDWIG NICOLAI, OF DRESDEN, GERMANY.

QARD-BOARD'TUBE.

SPECIFICATION forming part of Letters Patent No. 467,258, dated January19, 1892.

Application filed January 13, 1891. Serial No. 377,639. (No model.)

To all whom it may concern.-

Be it known that I, LUDWIG NIOOLAI, a subject of the King of Saxony,residing at the city of Dresden, in the Kingdom of Saxony, GermanEmpire, have invented certain new and useful Improvements in theMannfacture of Gard-Board Tubes, of which the following is aspecification.

This invention relates to the manufacture of tubes, casks, cases, andother hollow articles of paper, card-board, and similar materials, theinvention being particularlydirected to two pointsfirst, the forming ofthe article with a bottom or end, and, second, to the particulararrangement of the spiral strips of which it is composed. The body orwalls of the article are composed of spiral strips of the materialprovided with adhesive material and laid one over another, in additionto which there may be also employed longitudinal strips or completecylinders of suitable material, which may sometimes with advantage beplaced inside or outside the main carcase of the tube formed of thespiral strips. In applying the bottoms or ends to the articles I preferto proceed in the manner which will be best understood by reference tothe accompanying drawings, in which- Figure 1 is a plan of the end orbottom blank. Fig. 2 shows it in the course of plication to the case towhich it is to be applied. Fig. 3 represents a portion of a tube withthe particular spiral winding above mentioned, and Fig. 4 is an externalelevation of portion of a complete case.

Like letters represent like parts throughout the drawings.

A represents the tube-body, which in Figs. 1 and 2 may be made in anydesired manner, the bottom piece being capable of application even to anordinary tube made of a simple sheet of the material rolled up, althoughfor many reasons I prefer to employ the spiral tubes already describedin this specification.

B represents the blank or end piece which may be flat or embossed,convex, or concave, and O are radial projecting pieces or hands, theformation of which will be sufficiently understood from Fig. l of thedrawings. Generally the parts B and O would be stamped out of the samesheet of material and be of the same thickness and consistency; but itwill thicknesses of material, either simply as a matter of strength orin order to have a portion fitting inside the case, or, if desired, thebands 0 may be made separate from the center B and glued or otherwisesecured to it, as required.

Fig. 2 shows the attaching of the end piece to the case or body A. Thebands 0, as will be seen from Fig. 2, are bent up at approximately rightangles to the center 13, and this may either be done by bending themover when B is in position or it may be done with dies by a separateoperation or at the same time that the blank is cut. The end Bis fittedonto or into the end of the body A, and the bands 0 are then presseddown upon the body A and secured in position by gluing or the like. InFig. 2 the bands 0' are shown pressed down onto the body A, the bands 0are shown standing out from the body A, not yet being pressed down uponit, and the band C in an intermediate position. When attaching theseends to the improved construction of body above described, the bands 0may either be all fastened down upon the body and the sub sequent coilswound upon it or a portion of the bands may be first pressed down, thenone or more coils of the material may be formed round those, and thenthe remaining bands putdown and anothercoil or coils madearound them. Ifdesired, also, each band C may have one coil of the paper or material ofwhich the body A is to be made wound upon it. Then C may be turned upand the next coil of the paper made underneath it, then C may be turneddown and the next coil made above it, and so on, the band and coil beingthus interwoven. Generally speaking, the bands 0 may all be fasteneddown at once upon the body A, and then other coils wound upon themwithout any alternate winding or interweaving, the adhesive materialemployed being found to be amply sufficient to hold the bottom securely.The bands C may be made of any length required, so as to form the lon-,gitudinal strips of the case, and with this arrangement, instead of ablank B 0 being struck, the blank B would be made to fit the case orvessel to which it was to be applied,

and the strips C would then be run along the case, carried over the'end,and back again on the other side. All the bands 0 may be placed entirelyinside the body A or entirely outside it, and may be covered or not witha cylindrical shell, which maybe placed inside or outside the body A.

The arrangement of the spiral coil shown in Fig. 3 is as follows, theobject being to obtain either upon the inside of the body A or upon theoutside or both a spiral conforma tion. This can perhaps be most readilydone by making the last lapping coil or coils of the body of a narrowerstrip D than those E underlying it, if the spiral is to be on theoutside, or overlying it if the spiral is to be on the inside. In Fig. 3the right-hand portion is in section and the left-hand portion is inelevation, and both of these refer to an outside spiral, although, aswill readily be understood, the construction of an inside spiral wouldbe substantially the same. Here the bands D and the spaces F betweenthem are of the same width, while the underlying bands E are madebroader, so as to allow the strips D to be wider than the spaces Gbeneath them, and thus to overlap the contiguous bands E and provideholding-space for D. The bands D, however, may be placed upon an alreadycompleted body having a smooth cxteriorthatis, with the edges of thespirals touching-the coils D being laid without any necessary referenceto the coils below them. \Vhere this superficial spiral arrangement isrequired, the coils D forming the spiral may with advantage be made ofmuch thicker material than would be employed for the ordinary strips, soas to obtain a good depth for the spiral; or several strips may beaccurately superposed, so as to form the spiral o whether inside oroutside the tube.

Generally speaking, the articles made according to this invention wouldbe cylindrical or at least circular in cross-section; but it should beunderstood that the shape of the article depends practically upon theshape of the mandrel upon which it is formed and that the shape of thearticle can be varied accordin gly.

A smooth or ornamental surface may be produced upon the tube or articleby covering it either outside or inside with paper or other suitablematerial. The spiral on the tube may be avoided by making the coilstouch.

I claim- 1. The herein-described article of man ufacture, consisting ofthe tubular body formed of spiral strips of paper and having the endformed with the strips 0 confined and bound to the main body by saidspiral strips, substantially as described.

2. As an article of manufacture, the hereindescribed card-board tube,composed of successive strips of card-board wound spirally one uponanother, the first being wound loosely, leaving spaces between eachconvolution, and the second covering the spaces between the convolutionsof the first spiral and overlapping the edges of the same, theoverlapping edges being fastened together by paste or cement,substantially as described.

In testimony whereof I have hereunto set my hand in presence of twowitnesses.

LUDlVIG NICOLAI.

Witnesses:

BUD. SCHMIDT, EMIL DOMSCH.

